A 155 g sample of an unknown substance was heated from 25°C to 40°C. In the process, the substance absorbed 569 calories of energy. What is the specific heat of the substance?
Ans: 0.24 cal/g °C
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Constant Acceleration Kinematics: A car starting from rest accelerates at a constant 2.0 m/s2 for 10 s. It then travels with constant speed it has achieved for another 10 s. Then it finally slows to a stop with constant acceleration of magnitude 2.0 m/s2. How far does it travel after starting?
A. 200 m B. 300 m C. 400 m D. 500 m
Which of the following is the coldest at its surface?
A. white dwarf B. type K main sequence star C. main sequence star with a radius ten times the Sun's radius D. 3 solar luminosity main sequence star E. blue main sequence star
An innocent mosquito is flying along the interstate and has a collision with a speeding semi. Which one experiences a greater acceleration (change in velocity)?
A. The mosquito B. The semi C. They both experience the same acceleration D. There is no change in velocity
The most geologically active moon in our solar system is Ganymede
Indicate whether the statement is true or false